Designing a Playwright Test Plan

A strong Playwright suite starts with a clear test plan, not just a collection of scripts. A risk-based plan clarifies what you will cover with UI tests, what belongs in other layers, and how you will measure success.

Defining Scope and Risks for Playwright #

Begin by mapping key user journeys, critical business flows and technical risks. Decide which parts require end-to-end browser tests and which are better handled at API or unit level.

Example Playwright test plan outline:
- Product: Demo MyShop web app
- Goals: Protect checkout, auth and account flows from regressions
- In scope: UI flows for login, browse, cart, checkout, profile
- Out of scope: Pure data validation covered by API tests
- Risk areas: payments, discounts, auth, localisation
- Strategy: smoke (@smoke), regression (@regression), a11y (@a11y), visual checks

Use the plan to select which flows deserve deeper coverage (more scenarios, browsers and devices) and which only need basic smoke checks.

Common Mistakes #

Mistake 1 — Skipping the planning step entirely #

This leads to scattered tests.

❌ Wrong: Adding tests opportunistically without a shared vision.

✅ Correct: Document scope, risks and priorities up front.

Mistake 2 — Trying to cover everything with UI tests #

This harms performance.

❌ Wrong: Duplicating unit and API tests at the browser layer.

✅ Correct: Reserve Playwright for flows where browser-level confidence matters most.